Steam-boiler.



PATENTED MAY 10, 1904.

A. G. HOHENSTEIN. vSTEAM BOILER.

AIPLIUATION FILED JUNE 1. 1903.

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A. G. HOHENSTEIN.

STEAM BOILER.

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No. 759,521. PATENTED MAY l0, 1904, A. G. HOHENSTEIN.

STEAM BOILER.

APPLIUATION FILED JUNE 1. 1903.

N0 MODEL. 3 SHEETS-SHEET 3.

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UNITED STATES Patented May 10, 1904. r

PATENT OEEICE.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 759,521, dated May 10, 1904.

Application filed June l, 1903. Serial No. 159,686. (No model.)

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Be it known that I, ARCIAIIE GERRY HOIIEN- STEIN, a citizen of the United States, residing at New Haven, in the county of `New Haven and State of Connecticut, haveinvented or discovered certain new and useful Improvements in Steam-Boilers, of which improvements the following is a specification.

The invention described herein relates to the embodiment of my three-tube system in :forms or constructions of boilers which are especially adapted for use on small vessels.

In general terms the invention consists in the combination, with the three-tube system, of two upper drums connected to the upper water-chambers of such system. Laterallyarranged downtakes form said drums, said downtakes being connected to .equalizingboxes, which in turn are connected to the lower water-chambers; and the invention further consists in certain combinations and arrangements of elements, as hereinafter speciiied.

In the accompanying drawings, formingA a part of this speciiication, Figure 1 is a front elevation of my improved boiler, part of the casing being removed. Fig. 2 is a rear elevation, a portion ot' the casing being removed; and Fig. 3 is a side elevation, the downtakes of the side being removed.

In the practice of my invention the front headers may be made inthe form of a double header divided by a diaphragm 4 into two chambers or compartments or of two single independent headers, one directly above the other, as describedand shown in application, Serial No. 159,684, iiledJ une ,1, 1903. Three series of tubes' 5, 7 and 8 extend from these chambers across the boiler and have their rear ends connected by the junction-boxes 6. As stated in the application referred to, the lower series of tubes 5 it made ot' a capacity equal or approximately equal to the combined capacity of the two series of upper tubes 7 and 8. The headers 1 are supported by and connected to an equaliZing-box 39, which in turn is connected to supporting water legs 40. These water-legs rest upon and are connected to equalizing-boxes 16, arranged on opposite sides of theiire-box and by preference slightly below the level of the grates. The upper ends of the headers are connected to and i'orm supports for an equalizing-box 41, which in turn is connected to and `forms the support for front ends of the drums 12, which extend rearwardly and have their rear ends connected by a steam-pipe 42, which is adapted to prevent any spreading or separation oi' the drums at their rear ends. As these drums have both water and steam connections, they form practically one steam-breaking space, for which a single drum might be substituted. Each of these drums is connected to one of the equalizing-boxes 16 by downtakes 13. These downtakes are so constructed and connected to the drums and to the equalizing-boxes that they form practically closed water-walls for the sides of the fire-box. By this construction I obtain a full loop circulation of the water, the circulation being divided at the upper junction-box 41 and flowing by the upper drums, through the several downtakes, tc the lower equalizing-boxes, thence by the supporting water-legs to the equalizing-box 39, where the circulation again unites, but is immediately separated or subdivided by the headers 1, leading from this equalizing and distributing box 39. The junction-boxes at the ends of the tubes 5, 7, and 8 are supported by a wall 35, forming the rear wall ot' the lire-chamber.

It ischaracteristic ot' this construction that a very large combustion-chamber is provided and that approximately all ot' the tubes, headers, drums,`downtakes, and equalizing-boxes are employed as heating-surface.

It will be observed that the downtakes form side water-walls not only 'for the lire-box, but also for the combustion-chamber, so that all the walls ot' the tire and combustion chambers are formed by water-walls, which form parts oi. the circulating system.

vThe series of tubes 5, 7, and 8 may be reversed, the series 5 extending with a downward inclination from the upper Watercham bers and the series 7 and 8 extending with an upward inclination from the lower waterchambers, as shown and described in application Serial No. 159,684, filed June 1, 1903.

l claim herein as my invention- 1. A water-tube boiler having' in combination two series ot' water-chambers at the front IOO of the boiler, three connected series of tubes extending from said chambers, combined steam and water drums connected to the upper water-charnbers, and return connections from said drums to the lower water-Chambers, a portion of said return connections forming side walls for the Combustion-chamber, substantially as set forth.

2. A water-tube boiler having in icornbination two series of water-chambers at the front of the boiler, three connected series of tubes extending from said chambers, combined steam and water drums Connected to the upper water-chambers, downtakes extending from said drums and forming side water-walls for the combustion chamber, equalizing boxes connected to the lower ends of the downtales, and connections from said boxes to the lower water-chambers, substantially as set forth.

3. A water-tube boiler having in eornbinan tion two series of water-Chambers at the front of the boiler, three connected series of tubes extending from said chambers, combined steam and water drums connected to the upper water-chambers, downtakes extending from said druins and forming side water-walls for the combustion-chamber, equalizing-boxes connected to the lower ends of the downtakes, water-legs supported on said boxes, andl an equaliZing-box supported by the legs and supporting' the water-chambers, substantially as set forth.

4. A Water-tube boiler having in oornbination front headers, three connected series of tubes extending from said headers, an equalizingbox supported by said headers, two drums connected to said box, downtakes extending down from each of said drurns, equaliZing-boxes connected to the downtakes, water-legs resting on and connected to said boxes, and an equaliZing-box supported by said legs and serving as supports for the headers, substantially as set forth.

5. A water-tube boiler having in Combination two series of water-Chambers at the front of the boiler, three connected series of tubes extending from said chambers, downtakes arranged to forni water-walls at the sides of the boiler and having their ends connected respectively to the upper and lower water-chambers, substantially as set forth.

6. A water-tube boiler having in combination two series of water-chambers at the front of the boiler, three connected series of tubes extending from the water-chambers, an equalizing-box connected to the upper water-charnbers, downtales Connected to the equalizingeharnber and arranged to form water-walls for the sides of the boiler, equalizing-boxes eonneoted to the Ydowntakes and to the lower water-chambers, substantially as set forth.

In testimony whereof 1 haveJ hereunto set my hand.

ARCHIE G. HOHENSTEIN.,

Witnesses:

DARWIN S. W'oLooT'r, J. C. DAVIDSON. 

